modpagespeed for nginx (ubuntu)

#!/bin/sh

### BEGIN INIT INFO
# Provides:       nginx
# Required-Start:    $local_fs $remote_fs $network $syslog $named
# Required-Stop:     $local_fs $remote_fs $network $syslog $named
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: starts the nginx web server
# Description:       starts nginx using start-stop-daemon
### END INIT INFO

PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin
DAEMON=/usr/sbin/nginx
NAME=nginx
DESC=nginx

# Include nginx defaults if available
if [ -r /etc/default/nginx ]; then
        . /etc/default/nginx
fi

STOP_SCHEDULE="${STOP_SCHEDULE:-QUIT/5/TERM/5/KILL/5}"

test -x $DAEMON || exit 0

. /lib/init/vars.sh
. /lib/lsb/init-functions

# Try to extract nginx pidfile
PID=$(cat /etc/nginx/nginx.conf | grep -Ev '^\s*#' | awk 'BEGIN { RS="[;{}]" } { if ($1 == "pid") print $2 }' | head -n1)
if [ -z "$PID" ]
then
        PID=/run/nginx.pid
fi

# Check if the ULIMIT is set in /etc/default/nginx
if [ -n "$ULIMIT" ]; then
        # Set the ulimits
        ulimit $ULIMIT
fi

#
# Function that starts the daemon/service
#
do_start()
{
        # Return
        #   0 if daemon has been started
        #   1 if daemon was already running
        #   2 if daemon could not be started
        start-stop-daemon --start --quiet --pidfile $PID --exec $DAEMON --test > /dev/null \
                || return 1
        start-stop-daemon --start --quiet --pidfile $PID --exec $DAEMON -- \
                $DAEMON_OPTS 2>/dev/null \
                || return 2
}

test_nginx_config() {
        $DAEMON -t $DAEMON_OPTS >/dev/null 2>&1
}

#
# Function that stops the daemon/service
#
do_stop()
{
        # Return
        #   0 if daemon has been stopped
        #   1 if daemon was already stopped
        #   2 if daemon could not be stopped
        #   other if a failure occurred
        start-stop-daemon --stop --quiet --retry=$STOP_SCHEDULE --pidfile $PID --name $NAME
        RETVAL="$?"

        sleep 1
        return "$RETVAL"
}

#
# Function that sends a SIGHUP to the daemon/service
#
do_reload() {
        start-stop-daemon --stop --signal HUP --quiet --pidfile $PID --name $NAME
        return 0
}

#
# Rotate log files
#
do_rotate() {
        start-stop-daemon --stop --signal USR1 --quiet --pidfile $PID --name $NAME
        return 0
}

case "$1" in
        start)
                [ "$VERBOSE" != no ] && log_daemon_msg "Starting $DESC" "$NAME"
                do_start
                case "$?" in
                        0|1) [ "$VERBOSE" != no ] && log_end_msg 0 ;;
                        2) [ "$VERBOSE" != no ] && log_end_msg 1 ;;
                esac
                ;;
        stop)
                [ "$VERBOSE" != no ] && log_daemon_msg "Stopping $DESC" "$NAME"
                do_stop
                case "$?" in
                        0|1) [ "$VERBOSE" != no ] && log_end_msg 0 ;;
                        2) [ "$VERBOSE" != no ] && log_end_msg 1 ;;
                esac
                ;;
        restart)
                log_daemon_msg "Restarting $DESC" "$NAME"

                # Check configuration before stopping nginx
                if ! test_nginx_config; then
                        log_end_msg 1 # Configuration error
                        exit 0
                fi

                do_stop
                case "$?" in
                        0|1)
                                do_start
                                case "$?" in
                                        0) log_end_msg 0 ;;
                                        1) log_end_msg 1 ;; # Old process is still running
                                        *) log_end_msg 1 ;; # Failed to start
                                esac
                                ;;
                        *)
                                # Failed to stop
                                log_end_msg 1
                                ;;
                esac
                ;;
        reload|force-reload)
                log_daemon_msg "Reloading $DESC configuration" "$NAME"

                # Check configuration before reload nginx
                #
                # This is not entirely correct since the on-disk nginx binary
                # may differ from the in-memory one, but that's not common.
                # We prefer to check the configuration and return an error
                # to the administrator.
                if ! test_nginx_config; then
                        log_end_msg 1 # Configuration error
                        exit 0
                fi

                do_reload
                log_end_msg $?
                ;;
        configtest|testconfig)
                log_daemon_msg "Testing $DESC configuration"
                test_nginx_config
                log_end_msg $?
                ;;
        status)
                status_of_proc -p $PID "$DAEMON" "$NAME" && exit 0 || exit $?
                ;;
        upgrade)
                log_daemon_msg "Upgrading binary" "$NAME"
                do_upgrade
                log_end_msg 0
                ;;
        rotate)
                log_daemon_msg "Re-opening $DESC log files" "$NAME"
                do_rotate
                log_end_msg $?
                ;;
        *)
                echo "Usage: $NAME {start|stop|restart|reload|force-reload|status|configtest|rotate|upgrade}" >&2
                exit 3
                ;;
esac

:

pagespeed on;
pagespeed FileCachePath "/tmp";
location ~ "\.pagespeed\.([a-z]\.)?[a-z]{2}\.[^.]{10}\.[^.]+" {
        add_header "" "";
}
location ~ "^/pagespeed_static/" { }
location ~ "^/ngx_pagespeed_beacon$" { }

pagespeed EnableFilters insert_dns_prefetch,local_storage_cache,sprite_images,move_css_above_scripts,collapse_whitespace,combine_heads,elide_attributes,rewrite_javascript,rewrite_images,prioritize_critical_css,dedup_inlined_images,remove_comments,remove_quotes,rewrite_style_attributes,trim_urls,defer_javascript,resize_mobile_images,lazyload_images,move_css_to_head,inline_images,recompress_images,convert_jpeg_to_progressive,recompress_jpeg,recompress_png,recompress_webp,strip_image_color_profile,strip_image_meta_data,jpeg_subsampling,resize_images,convert_jpeg_to_webp,convert_to_webp_lossless,insert_image_dimensions,resize_rendered_image_dimensions,add_head;